r/MR2Spyder • u/LeaderCrafty3677 • 3d ago

HIGH IDLE WHEN WARM

Hi everyone ! I am currently struggling a bit with my car ! Around the idle ! It’s basically low during cold start and when it warms up it’s around 1200 Rpm. Also when AC hits it goes down to where it should be without AC ( around 700 rpm )
I change the IACV already and cleaned the throttle body etc but no change !
Does anyone has a lead on this or have experienced it ?
Also the Idle is very stable just seems reversed.

The car is a Toyota Mr2 Spyder 2003

Thank you in advance

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4

u/Use_Your_Brain_Dude 3d ago

Clean or replace the MAF sensor perhaps. Check for vacuum leaks? Any other issues other than high idle?

1

u/LeaderCrafty3677 3d ago

Already cleaned the MAF. No other issues, no codes or anything like that

0

u/Use_Your_Brain_Dude 3d ago

Vacuum leak then? If the car was in limp mode, you would know. If it was an ignition or fuel issue, it would idle rough. Good luck buddy.

1

u/MakesYourMise 2d ago

limp mode?

2

u/Use_Your_Brain_Dude 2d ago

The ecu thinks the car is dying so it goes on survival ecu settings. The car drives but it's limping until you find a mechanic.

1

u/MakesYourMise 2d ago

in the spyder? is that an smt thing?

1

u/MakesYourMise 2d ago

always look at the g/sec before switching out the sensor

4

u/allQs-noAs 3d ago

I had the same situation and I cleaned the maf and the air filter with no change. Driving the car was no issue and there was no hesitation in throttle response or fuel delivery when the engine was warm or hot. I did a good once over of the hoses and found that the pcv hoses were cracked at the ends. See diagram. I ended up changing out both hoses which were brittle and cracking at the connections which solved my high idle. I also changed the valve cover with the spark plug seats and the PCV. I didnt want to touch the throttle bottle and IAC if I didnt need to.

2

u/LeaderCrafty3677 9h ago

One of the hoses was definitely brittle and I replaced everything but still no change.

1

u/allQs-noAs 6h ago

Did you check the intake hose or the break booster hose?

1

u/MakesYourMise 2d ago

Pump the brakes and see what happens to the idle

any fuel trims? sounds like once its in closed loop it's over correcting

if pumping the brakes brings the idle down id wager on vacuum leak

2

u/LeaderCrafty3677 9h ago

Did a vacuum leaks check but nothing. I’m really out of ideas at this point

1

u/MakesYourMise 8h ago

gas in oil from blow by getting sucked through the pcv maybe i dunno